Charles l



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METALLIC SEAL.

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Unirse STATES PATENT OFFICE.

CHARLES L. POND, OF BUFFALO, NEW-YORK.

METALLIC SEAL.

SPECIPECATION forming part of Letters PatentlNo, 345,173, dated July 6, 1886.

Application filed June 1, 1886.

To @ZZ whom, t may concern.-

Be it known that I, CrLxRLns L. POND, of the city of Buffalo, in the county of Erie and State of N ew York,have invented new and useful Improvements in Metallic Seals, of which the following is a specification.

This invention relates to that class of metallic seals which consist of a disk or ball of soft metal and a shackle-wire.

The object of this invention -is to produce a simple, cheap, and reliable seal of this kind in which the shackle-wire is secure] y attached to the seal disk or ball. after the latter is pressed, so that the seal disk or ball cannot be detached or stripped from the wire without detection.

My invention consists to that end of the improvements, which will be hereinafter fully described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a sectional elevation of my improved seal with the ends of the shackle-wire inserted in the threading-holes. Fig. 2 is a similar view showing the seal-disk reversed, whereby the wire is bent and attached to the seal-disk. Fig. 3 is a perspective view of the seal ready for pressing.' Figli is a top plan View of the seal on an enlarged scale. Fig. 5 is an enlarged elevation of one form of the shacklewire. Fig. 6 is a cross-section of the same. Fig. 7 is a longitudinal section showingaportion of this threading-wire embedded in the seal. Fig. S is an enlarged elevation showing another form of thethreading-wire. Fig. 9 is a cross-section of the same. Fig. 10 is a longitudinal section showing a portion of this threading-wire embedded in the seal. Fig.11 is an enlarged elevation showing another form of the threading-wire. Fig. 12 is a cross-section of the same. Figs.` 13 and 14 are enlarged cross-sections of different forms of threading-wire.

Like letters of reference refer to like parts in the several figures.

A represents the ball or diskconstructed of lead or other soft metal, and composed of two circular plates, a a, and three parallel bars, b b b', arranged between the plates a a and separated by two threading-holes, c c. The bar b is arranged centrally in the seal-disk, and extends from the top thereof nearly to the Serial No. 203.892.

`(No model.)

bottom. The two bars b are arranged on opposite sides of the central bar,b, and are separated therefrom by the threading-holes c c. The outer bars, b', are somewhat shorter than the central bar, b, and have their outer lower corners rounded off to facilitate bending the wires around the same. The circular plates a a project beyond the lower ends of the bars I) b forming a recess, d, between the plates and below the bars, and these, plates project also beyond the outer bars, b', forming recesses e e on the outer sides of said bars and between the circular plates.

F represents the shackle-wire, which is inserted with its ends into the threading-holes c c, as represented in Fig.1. Upon reversing the seal-disk or turning it about an axis at right angles to the threading-holes, and distending the upper portions ofthe wire, the threading ends of the wire are bent to form two hooks, as represented in Figs. 2 and 3, whereby both ends of the wire are attached to the disk. The lower bent portions of the wire are concealed in the bottom recess, d, and the lower side portions of the wire restin the side recesses, e. The seal can now be placed in a suitable press which closes the metal upon the lwire and produces the impression.

f represents downwardly-projecting ears or lips formed at the lower edges of the circular plates a for the purpose of supporting the disk in the cavity of the seal-press and holding the disk centrally between the dies. A single lip or ear, f, may be used, if desired.

In referring to t-he upper and lower sides of the seal-disk I refer to the sides which form, respectively, the upper and lower sides when the disk is ready to be pressed. f

It is obvious that the hooks may be bent upon both ends of the shackle-wire, as represented in Fig. 2, and that the wire may be inserted in the threading-holes from below, in-

stead of inserting the wire from above, and forming the hooks by reversing the seal-disk, as described.

The shackle-wire consists of a single strand,

which is spirally twisted about its own axis,

as shown inl Figs. 5, 8, and 11. The wire or strand is drawn or rolled in such manner that its cross-section is reduced in width from its outer edge toward the center, or, in other 3o Figs. 11 and 12.

words, provided with outwardly-enlarged end portions or heads, g, as represented in Figs. 6, 9, 12, 13, and 14. By twisting awire of this cross-section the spiral ribs formed by the enlarged headsg of the erosssection produce overhanging holding surfaces. Then the sealdisk is eompressed,the metal Hows underneath these overhanging surfaces, as represented in Figs. 7 and 10, and firmly anchors the wire in the seal.

In the wire represented in Figs. 5, 6, and 7 the heads g are rounded.

In the wirerepresented in Figs. 8, 9, and 10 the heads are dovetaii shaped and joined together with their small ends. y

In the wire represented in Figs. 11 and 12 the cross-section is similar to that of the wire represented in Fig. 9, except that the sides of the cross-section are rounded in Figs.11 and 12.

In the wire represented in Fig. 13 the heads g are rectangular and project from opposite sides of a. connecting-web, g.

In the wire represented in Fig. 14 the cross-section is provided with four projectingheads g.

If desired,the spiral ribs of the wire may be provided in their outer surfaces with longi. tudinal grooves h, arranged parallel with the axis of the twisted wire, as represented in Y In compressing the seal the metal flows into these grooves vh and forms tongues,which resist any attempt to turn the wire in the seal-disk for the purpose of detaching the wire from the seal-disk without detection.

I claim as my invention- 1. Ascal-disk of soft metal composed of two plates, a a, a central bar, b, and side bars, b b', separated from the central bar, b, by two threading-holes, and having a bottom recess. d, and side recesses, e e, on the outer sides of the bars b', substantially as set forth.

2. A seal-disk of soft metal constructed at its lower edge with a projecting ear, whereby the disk is supported in the press and centered between the dies, substantially as set forth.

3. A twisted shackle-wire having its crosssection constructed with outwardly-enlarged heads, substantially as set forth.

4. A twisted shackle-wire having its spiral ribs provided in their outer surfaces with grooves, whereby the wire is held in the sealdisk against turning,substautiall y as set forth.

Witness my hand this 27th day ofMay,1886. 5 3

CHARLES L. -POND Witnesses:

OsoAR SCHAUB, CARL F. GEYER. 

